[Hammer]

I've never been a big beliver in CAI kits.

Dyno tests with CAI kits alone on the older 2 valves told the story of: "Yea, it looks kinda cool under the hood, but you paid how much for 4 more horses at the rear wheels?"

The 3-valve engines seem to take a little more kindly to after-market CAI kits.
5.0 Mustang got an additional 13 horses on their best run with an 05 and the BBK piece.

I'd expect around a 10rwhp gain.

Most pieces are plug and play the MAF and T\B.

Honestly, If you're stock, a better first purchase would be a good shifter and 3.73s\4.10s...